[PDF] Top 20 Programas de prevención del consumo de sustancias psicoactivas de tres universidades en Medellín

... a witness w for x, then the same E must output a witness w for x when interacting with ...a witness for x by itself, which is impossible unless BPP = ... See full document

... on non-falsifiable assumptions such as knowledge-of-exponent as- sumptions [Dam91, HT98, BP04b, Mie08, Gro10, Lip12, GGPR13, Lip13, DFGK14, Lip16, GM17], extractable collision-resistant hashing [BCCT12, DFH12, BCC ... See full document

... MIP prover functions is such that the SMFC is indeed complexity preserving, which is indeed the case in our construction, where the provers can be represented by appropriate succinct ...the witness, which ... See full document

... Paterson et al. [16] gave a modified version of the Shacham-Waters scheme which they showed is secure in the unconditional security setting. They argued that, in the setting of unconditionally security, any keyed PoR ... See full document

... Proofs in CoQ or Isabelle/HOL are, again in this authors words, more “procedural”, and “opaque”, but definitely more powerful. The disadvantage is that the learning curve is much steeper, particularly when early ... See full document

... is non-trivial, and it has been the subject of several subsequent works [VV09, CG15, ...the proofs submitted by any malicious prover, this compilation technique breaks ...a witness for the ... See full document

... Our protocol. So both in Fiat-Shamir and in Fischlin’s scheme we face the challenge that it is difficult to get the query inputs made by the malicious prover. Nevertheless, in our construction we will still try to ... See full document

... the multi-server setting with computationally unbounded provers, one can overcome the limitation that the verifier needs to store as much secret information as the ... See full document

... A non-malleable protocol should en- sure that such an adversary gains no ...build non-malleable protocols, without any additional setup or rounds of ...core non-malleable ... See full document

... Self destruction. Unfortunately, even for very simple classes Φ, continuous non- malleability as hinted above is actually impossible to achieve. Indeed, a simple attack—proposed for the first time by Gennaro et ... See full document

... be witness indistinguishable; notice that, in contrast to PZAPs, ZAPs become uninteresting in this case as the prover could simply forward the witness to the ... See full document

... is a codeword encoding s). Third, we prove that plugging in a leakage-resilient non-malleable code in the Dziembowski et al. compiler secures any functionality against tampering and leakage attacks at the ... See full document

... 30 Oded Goldreich, Tom Gur, and Ilan Komargodski. Strong locally testable codes with relaxed local decoders. In 30th Conference on Computational Complexity, CCC 2015, June 17-19, 2015, Portland, Oregon, USA, pages 1–41, ... See full document

... of non-malleable extractors essentially follow the same high level sketch: first obtain a small advice on L = O(log(1/)) bits such that with probability 1 − , the advice is different from its tampered ...a ... See full document

... introduce Non-malleable Randomness ...ing non-malleable encoding C. The non-malleability is, as for standard NMCs, defined with respect to F , a family of tampering ...any non- ... See full document

... the prover is honest then he generates a randomly distributed x 0 ∈ L 0 , independent of CRS, whereas our PoI have this property only for an honestly generated ... See full document

... Proof: To show that the zero-knowledge, it needs protocol to be for verified quadratic residues that given is perfect the input to the proof, the forging algorithm and the original proof[r] ... See full document

... public key pk = PK(sk), an encryption c = Enc(pk, m) of the encoded message and a simulation-sound NIZK proof of knowledge π of some sk such that pk = PK(sk ) using c as a label. Decoding will check the proof and if it ... See full document

... The multi-exponentiations computed by the verifier in [FFG + 16] act as a hash on data and different computations may be performed (verifiably) on ...the multi-exponentiation is part of the proof, and ... See full document

... There, they were not interested in the correctness of a specific computation per se, but rather in the existence of an “incorrect object”, namely an accepting proof for a false statement in ZAPs, or a commitment with ... See full document